Roof-based solar quote & site yield
Prefer a guided tour? Walk from your driving to a real quote, step by step →
Estimate, not a signed installer quote or financing offer. The default total is a real listed installer package price; the component split is illustrative and editable.
1 · Your site
Real monthly sunlight for your roof from PVGIS (EU JRC)
South is negative, e.g. −26.14
Wiring, inverter, dust, heat; 14% is typical
≈1% per hour of shade a day
Using 125 kWh/kWp/month until you fetch sunlight data for these coordinates.
2 · Roof, panels & inverter
Incl. spacing; ~2.8 m² for 600 W+
Roof fits up to 14
Array 14 × 620 W = 8.68 kWp
Real quoted total; overrides the build-up below. Set to 0 to use the component prices.
Default: JC Solar 8 kW Solis + 10 kWh battery + 8.64 kWp, installed in Gauteng incl. CoC — R124,753 listed (checked 21 Oct 2026; out of stock; VAT not stated). Replace it with your own installer's quote.
Unit prices (illustrative build-up — overridden by the package price)
Roof needed for your EV driving
Solar sized to cover your home charging energy over a month
Roof angle: for most year-round output in South Africa, face panels north at roughly your latitude, about 26°. Your roof is set to 26°. Change it in section 1 and fetch sunlight again to compare. This covers the energy over a month only: sunlight while the car is away still needs a battery or a grid export arrangement, and it excludes your household use.
3 · Cost breakdown
R14.37 per Wp installed
The total is the real installer package price; the line split is indicative only (scaled from the illustrative build-up).
| Panels | R24 081 |
| Inverter | R26 356 |
| Battery | R39 013 |
| Mounting & wiring | R12 040 |
| Installation labour | R18 061 |
| CoC, permits & other | R5 202 |
| Total installed | R124 753 |
4 · Payback
Cash purchase, grid savings only
Solar used is capped at your 800 kWh/month household use (EV charging excluded). Ignores fixed grid charges (they stay), battery replacement and finance costs. Bars turn green once savings cover R124 753.
5 · EV + solar finance package
Loading rate sheet…
Uses this quote's system and price, the rate sheet's finance terms, and your driving, vehicle and household inputs from the calculator (1 500 km/month, 800 kWh/month house).
| Scenario | Vehicle | Solar | Fuel + grid + public | Monthly total |
|---|---|---|---|---|
| Petrol/diesel + grid | R7 000 | R0 | R6 630 | R13 630 |
| EV + grid | R7 000 | R0 | R4 378 | R11 378 |
| Petrol/diesel + solar | R7 000 | R2 411 | R3 529 | R12 941 |
| EV + solar | R7 000 | R2 411 | R1 224 | R10 635 |
EV + solar saves R2 995/month vs petrol/diesel + grid
Solar loan R2 311/month on R124 753. Finance is hypothetical and subject to lender approval. Vehicle payments follow the calculator's mode (entered repayment or new loan).
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